Seller did not send the protectors that should come with the printheads. This is a scam. Seller did it on purpose and fooled me. I paid but didn't receive everything. AliExpress is supporting such behavior because it solved the dispute in favor of seller. I'll never buy again in AliExpress and will spread this case so everyone I know don't use this site too. This is a big SCAM. You pay but don't get what you paid for.